人教版高一英语上12

[06:17.84]However,people today are still building more houses.
[06:23.19]The population in and around San Francisco
[06:28.55]is now ten times more than it was in 1906.
[06:32.65]This means that if there is another big earthquake,
[06:37.69]a great many houses and building will be destroyed.